Tripod for rock-drills.



No, 668,493. Patented Feb. I9', 19m.

.L J. cmPPEN.

TRIPOD FOR ROCK. DBILL'S.

(Application filed Sent. 20. 1900.1

nnifnmvll MIME lIII I @www @Nitrit STATES JOSEPH J. ORIPPEN, OF DENVER, COLORADO.

TRIPOD` FOR ROCK-DRILLS.

SPECIFICATION forming part of Letters Patent No. 668,493, dated February 19, 1901.

- Application filed September 20, 1900. 'Serial No. 30.615. (No model.)

To all 1071/071?, it nelly concern:

Be it known that I, JOSEPH J. CRIPPEN, a citizen of the United States, residing at Denver, in the county of Arapahoe and State of Colorado, have invented certain new and useful Improvementsin Tripods for Rock-Drills; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in tripods for supporting rock-drills.

The object ol' the invention is to provide a device of this character which is simple of construction, effective in use, and in which the movable parts are susceptible of a wide range of adjustability.

With this and other minor objects in view the invention consists of certain novel features of construction, combination, and arrangement of parts, as will be hereinafterk more fully described, and particularly pointed out in the appended claims.

In the accompanying drawings, Figure 1 is a rear elevational view of a tripod constructed in accordance with my invention. Fig. 2 is a top plan view thereof. Fig. 3 is a vertical transverse section on line 3 3 of Fig. 2. Fig. 4 is a vertical section through the frame and head on line 4 4 of Fig. 2. Fig. 5 is a rear elevation of the head. Figs. 6 and 7 are detail views showing the construction and manner of mounting the legs. Fig. 8 is a rear elevation of the frame. Fig. 9 is adetail View of a portion of the frame and one of the blocks for confining the trunnions of the head.

Like reference characters indicate corresponding parts throughout the several views.

The numeral 1 in the drawings represents a U-shaped frame having its ends facing forwardly and provided with horizontal slots 2, forming bearings to receive the trunnions 3 on opposite sides of the tripod-head 4, the said trunnions being held in their bearings by blocks 2', fastened in the outer ends of the slots 2 by means of vertically-disposed pins a, passing through the ends of the U- shaped frame and through said blocks. This head is inclosed by said frame and is adapted to tilt backward a'nd forward on its trunnions to any desired degree. Upon the rear of the head is formed or provided a curved the former, as shown in Fig. 1.

plate or segment 5, adapted to move within a slot 6, formed in the rear portion of the frame and having in its rear edge two parallel longitudinal rows of sockets or seats 7 and 8, the seats of one row being disposed on lines between the seats of the other row, as clearly shown in Fig. 5. These seats are adapted to receive locking-pins 7iL and 8, mounted in openings formed in a flange 9, risingfrom the frame in rear of said slot 6. The pins are disposed one to one side of and below the other, and the piu 7 is adapted to engage either one of the seats 7 and the pin 8 to engage either one of the seats S to hold the head 4 at any desired angle to which it is adjusted. The object iu employing two rows of seats arranged as described is to provide for the minute adjustment of the head without arranging the seats so close as to weaken the head and the webs between them.

It will be seen that by this construction the head may be quickly and conveniently released, adj Listed, and locked at any desired angle.

The supporting-legs 10 of the tripod are alike in construction, each being mounted upon a coupling 10, comprising two sections 11 and 12, halved to have an interlocking engagement,the halved portions being provided, if desired, with teeth or corrugations 13 to afford a firm and secure engagement. A bolt 14 passes transversely through the halved or overlapping portions and adj ustably connects the same. By loosening this bolt the lower members 11 of the couplings may be swung in either direction to adjust the legs in a direction at right angles to the bolt, and then by tightening the bolt the legs will be held securely against movement, the teeth or corrugations 13 acting to prevent casual swinging of the part 11 after the bolt has been' tightened. By manipulating the parts in this manner the side legs may be adjusted laterally toward or from the frame and the rear leg longitudinally from front to rear of said frame, the coupling of the latter being disposed at right angles to the couplings of The upper sections 12 of the couplings are mounted to swing upon pivot pins or bolts 14', projecting from or passed through brackets 15, depending from the sides and rear of the frame 1,

IOO

the side legs being thus arranged to swing to the front and rear and the rear leg toward opposite sides of the frame. By this means it will be seen that each leg is mounted to swing in the ares of two circles in planes at right angles to each other, so as to secure an effective adjustment either transversely or longitudinally of the frame.

The operation of the device will be readily understood from the foregoing description taken in connection with the accompanying drawings, and it will be seen that a simple and eective construction of tripod in which the movable parts have a wide range of adjustability is provided. While the preferred embodiment of the invention is as herein disclosed, it will of course be understood that changes in the form, proportion, and minor details of construction may be made within the scope of the invention without departing from the spirit or sacrificing any of the advantages thereof.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a tripod, the combination of a horizontal U-shaped frame havingits ends formed with bearing-slots, a head provided with tru nnions journaled in said slots, means for holding the head fixed in adjusted position, blocks fitted in said slots and confining the journals therein, and means for securing said blocks, substantially as set forth.

2. In a tripod, a U-shaped frame having its ends facing forwardly and provided at the rear and center with a guide-slot and a vertical ilange, a head having trunnions jour naled in said frame and provided at the rear with a segmental locking member movable in said slot and provided with parallel rows of seats, the seats of one row being arranged in lines between the seats of the other row, and pins upon said flange to engage said seats, substantially as set forth.

3. A tripod for rock-drills, comprising a U- shaped horizontal frame having its ends faeing forwardly and provided with bearings and dependingr brackets and formed at its central rear portion with a guide-slot, a tilting head having journals mounted in said frame and a locking` member movable in said slot, locking means on the rear portion of the frame to engage said locking member and hold the head in adjusted position, and legs pivoted to said depending brackets and each having an ajustable bipartite coupling, said legs being mounted to swing forwardly and laterally of the frame, substantially as set forth.

In testimony whereof I have hereunto set my hand in presence of two subscribing wit- DGSSGS.

JOSEPH J. CRIPPEN. Witnesses:

J oHN C. FELDWISCH, W. P. CAMPBELL. 

